cbcvebase.
CVE-2024-26752
published 2024-04-03

CVE-2024-26752: In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.25%
16.6th percentile
In the Linux kernel, the following vulnerability has been resolved: l2tp: pass correct message length to ip6_append_data l2tp_ip6_sendmsg needs to avoid accounting for the transport header twice when splicing more data into an already partially-occupied skbuff. To manage this, we check whether the skbuff contains data using skb_queue_empty when deciding how much data to append using ip6_append_data. However, the code which performed the calculation was incorrect: ulen = len + skb_queue_empty(&sk->sk_write_queue) ? transhdrlen : 0; ...due to C operator precedence, this ends up setting ulen to transhdrlen for messages with a non-zero length, which results in corrupted packets on the wire. Add parentheses to correct the calculation in line with the original intent.

Affected

36 ranges· showing 25
VendorProductVersion rangeFixed in
debiandebian_linux
debianlinux< linux 6.1.82-1 (bookworm)linux 6.1.82-1 (bookworm)
linuxlinux
linuxlinux
linuxlinux
linuxlinux>= 1fc793d68d50dee4782ef2e808913d5dd880bcc6 < c1d3a84a67db910ce28a871273c992c3d7f9efb5c1d3a84a67db910ce28a871273c992c3d7f9efb5
linuxlinux>= 4.14.327 < 4.154.15
linuxlinux>= 4.19.296 < 4.19.3084.19.308
linuxlinux>= 5.10.198 < 5.10.2115.10.211
linuxlinux>= 5.15.135 < 5.15.1505.15.150
linuxlinux>= 5.4.258 < 5.4.2705.4.270
linuxlinux>= 559d697c5d072593d22b3e0bd8b8081108aeaf59 < 4c3ce64bc9d36ca9164dd6c77ff144c121011aae4c3ce64bc9d36ca9164dd6c77ff144c121011aae
linuxlinux>= 6.1.57 < 6.1.806.1.80
linuxlinux>= 6.5.7 < 6.66.6
linuxlinux>= 96b2e1090397217839fcd6c9b6d8f5d439e705ed < dcb4d14268595065c85dc5528056713928e17243dcb4d14268595065c85dc5528056713928e17243
linuxlinux>= 9d4c75800f61e5d75c1659ba201b6c0c7ead3070 < 804bd8650a3a2bf3432375f8c97d5049d845ce56804bd8650a3a2bf3432375f8c97d5049d845ce56
linuxlinux>= 9d4c75800f61e5d75c1659ba201b6c0c7ead3070 < 83340c66b498e49353530e41542500fc8a4782d683340c66b498e49353530e41542500fc8a4782d6
linuxlinux>= 9d4c75800f61e5d75c1659ba201b6c0c7ead3070 < 359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79359e54a93ab43d32ee1bff3c2f9f10cb9f6b6e79
linuxlinux>= cd1189956393bf850b2e275e37411855d3bd86bb < 0da15a70395182ee8cb75716baf00dddc0bea38d0da15a70395182ee8cb75716baf00dddc0bea38d
linuxlinux>= f6a7182179c0ed788e3755ee2ed18c888ddcc33f < 13cd1daeea848614e585b2c6ecc11ca9c8ab250013cd1daeea848614e585b2c6ecc11ca9c8ab2500
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.82-16.1.82-1

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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